89807409 has 6 divisors (see below), whose sum is σ = 129721826. Its totient is φ = 59871600.

The previous prime is 89807351. The next prime is 89807429. The reversal of 89807409 is 90470898.

It can be written as a sum of positive squares in only one way, i.e., 82901025 + 6906384 = 9105^2 + 2628^2 .

It is not a de Polignac number, because 89807409 - 2¹³ = 89799217 is a prime.

It is a super-2 number, since 2×89807409² = 16130741422586562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89807429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4989292 + ... + 4989309.

Almost surely, 2^89807409 is an apocalyptic number.

It is an amenable number.

89807409 is a deficient number, since it is larger than the sum of its proper divisors (39914417).

89807409 is a wasteful number, since it uses less digits than its factorization.

89807409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978607 (or 9978604 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 89807409 is about 9476.6771075098. The cubic root of 89807409 is about 447.8205877712.

The spelling of 89807409 in words is "eighty-nine million, eight hundred seven thousand, four hundred nine".